Electrochemical properties of Pd nanostructures in alkaline solution

被引：68

作者：

Lee, Young-Woo ^{[1
]}

Han, Sang-Beom ^{[1
]}

Park, Kyung-Won ^{[1
]}

机构：

[1] Soongsil Univ, Dept Chem & Environm Engn, Seoul 156743, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 10期

关键词：

Pd nanostructures; Methanol electrooxidation; Catalytic activity; Stability; TERNARY COMPOSITE FILMS; METHANOL FUEL-CELLS; ELECTROCATALYTIC ACTIVITY; ETHANOL ELECTROOXIDATION; NANOCRYSTALS; CATALYSTS; SHAPE; OXIDATION; ACID; VOLTAMMOGRAMS;

D O I：

10.1016/j.elecom.2009.08.030

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report Pd nanoparticles on Vulcan XC-72R (Pd/C) synthesized by means of polyol process in poly(vinyl pyrrolidone) and NO3- ion. In X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis, the Pd/C consists of polygonal shapes such as dodecahedron, triangular, and hexagonal plates with dominant (1 1 1) plane. In cyclic voltammogram (CV), the polygonal Pd/C shows two reduction peaks as an evidence of dominant (1 1 11 facets of the Pd metallic phase. Furthermore, for methanol electrooxidation, the polygonal Pd/C despite slightly positive onset potential shows improved current-density and less accumulation of residues. Especially, the polygonal Pd/C without any serious agglomeration exhibits an excellent stability in comparison with commercial Pd/C. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1968 / 1971

页数：4

共 21 条

[1] Effect of Ru addition on the structural characteristics and the electrochemical activity for ethanol oxidation of carbon supported Pt-Sn alloy catalysts [J].

Antolini, Ermete ;

Colmati, Flavio ;

Gonzalez, Ernesto R. .

ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (03) :398-404

[2]

Aricò AS, 2001, FUEL CELLS, V1, P133

[3] Ultrasonic synthesis and evaluation of non-platinum catalysts for alkaline direct methanol fuel cells [J].

Bunazawa, Hideaki ;

Yamazaki, Yohtaro .

JOURNAL OF POWER SOURCES, 2009, 190 (02) :210-215

[4] Chemistry and properties of nanocrystals of different shapes [J].

Burda, C ;

Chen, XB ;

Narayanan, R ;

El-Sayed, MA .

CHEMICAL REVIEWS, 2005, 105 (04) :1025-1102

[5] Performance characterization of Pd/C nanocatalyst for direct formic acid fuel cells [J].

Ha, S ;

Larsen, R ;

Masel, RI .

JOURNAL OF POWER SOURCES, 2005, 144 (01) :28-34

[6] Platinum nanocube catalysts for methanol and ethanol electrooxidation [J].

Han, Sang-Beom ;

Song, You-Jung ;

Lee, Jong-Min ;

Kim, Jy-Yeon ;

Park, Kyung-Won .

ELECTROCHEMISTRY COMMUNICATIONS, 2008, 10 (07) :1044-1047

[7] Electro-oxidation of methanol on copper in alkaline solution [J].

Heli, H ;

Jafarian, M ;

Mahjani, MG ;

Gobal, F .

ELECTROCHIMICA ACTA, 2004, 49 (27) :4999-5006

[8] Voltammograms of stepped and kinked stepped surfaces of palladium:: Pd(S)-[n(111) x (100)] and Pd(S)-[n(100) x (110)] [J].

Hoshi, N ;

Kuroda, M ;

Hori, Y .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2002, 521 (1-2) :155-160

[9] Structural effects on voltammograms of the low index planes of palladium and Pd(S)-[n(100) x (111)] surfaces in alkaline solution [J].

Hoshi, Nagahiro ;

Nakamura, Masashi ;

Maki, Norihito ;

Yamaguchi, Shintaro ;

Kitajima, Ayako .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2008, 624 (1-2) :134-138

[10] Improved kinetics of ethanol oxidation on Pd catalysts supported on tungsten carbides/carbon nanotubes [J].

Hu, Fengping ;

Cui, Guofeng ;

Wei, Zidong ;

Shen, Pei Kang .

ELECTROCHEMISTRY COMMUNICATIONS, 2008, 10 (09) :1303-1306

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